Rabble-furnace construction



B. 6; CALL ET AL' RABBLE FURNACE CONSTRUCTION Filed Dec. 19 1921 2Sheets-Sheet 1 5. ca. ALI. ETHAL RABBLE FURNA CE CONSTRUCTION Filed Dec.19, 1921 2 Sheets-Sheet 2 Evading Patented Aug. 21, 11923.

GARFIELD, prams-seamless rear-inn or NEW YORK, N. Y., a CORPORATIONlabial? QEFFHCEQ inann wAssTArF, OF ion ann surname- COMPANY", 01, new

eissue-romance oeii'sa'n-Ucrzon.

' Original application filed octoo er a; 1917, Serial no. as

,soa. Divided and this application filed 1 i. December 19, 1321. Seral523,283.

To all 107mm it may com-m.- I

Be it known that we, BENJAMIN G. CALL, a citizen of the United States,and resident of Tacoma, county of Pierce, State of Washington, formerlya resident of Gar field, county of ,Sitlt Lake, State of Utah, andRICHARD A. l/VAGSTAFF, acitizen of the United States, and resident ofGarfield, county of Salt Lake, Statepf Utah, have 1 invented certain newand useful Improvements in Rabble-Furnace Constructions, of which thefollowing is a specification The invention relates in general to an oreroasting furnace and particularly relate to improvements in the shaft inthe rabble arms and in; the rabbles used in dial multiple deck oreroasting furnaces.

One of the objects of the invention is'to provide an improvedconstruction of rabbles and their correlated parts so designed thatburnt out or damaged partsniay be readily replaced without the necessityof demounting the entire organizatiomand without materially affectingthe position of the undamaged rabbles on anyone rabble arm.

Another object of the invention is to pro vide an improved and simplyconstructed means for supplying air tothe hearth" of the furnace to heatthe parts thereof. 7

Various other objects and'a'dvantages of the invention will be in partobvious from an inspection of the accompanying drawings and in part willbe more fully set forth in the following particular description of oneforniof mechanism embodying our invention, and the, invention alsoconsists in certain new and novel features of construction andcombination of parts hereinafter set forth andclaimed.

This application is a divisio-nof our copending application, Serial No.195,509 filedOctober 9, 1917, rabble construction.

In the drawings:'.; 7 Figure 1 is a vertical sectional view takenaxially through a multiple hearth roaster showing apreferredembodimentof our invention installed therein and shown in sideelevation; I i V Figure 2 is a vertical sectional view taken axiallythrough the-central column and one of the rabble arms; v

Figure, 8- is a transverse, sectional view taken on the line 33 ofFigure 2;

Figure at is a similar view taken on the line 4rl of Figure 2;

Figure 5 is a transverse sectional/view through one of the rabble armsand taken on the line 5-5 of Figure 2; i

Figure 6 is a fragmentary View of a portion of a rabble arm and attachedrabbles looking upwardly from underneath the arms;

Figures 7 and Sare respectively a view in side elevation and a view inplan showing details of the clamp forholding the rabble to the rabble arm;and

Figures 9, l0 and 11 are respectively a plan view, a view in sideelevation and a view in end elevation of the rabble.

Like reference characters denote like parts in the several figures ofthe drawings.

In the drawings there is shown a con ventional form of multiple hearthfurnace 10, including a bottom hearth 11, a top donie drying hearth l2,and certain intermediate hearths 13. Centrally positioned to extendthrough the several hearths is an upstanding shaft 14 formed of aplurality of sections, one section for each of the intermediate hearthsand a section for the bottom hearth. These sections include radial arms14, a pair of diametrically disposed arms for each of the spaces betweenadjacent superposed hearths and with the arms in one hearth disposed at90 from the arms in the hearth spaces just I above and below the same. i

As these sections are s milar in construction it will be understood thatthe detail description of any one section will be sufiicient for anyother similar section.

Referring particularly to Figure 2 it will be noted that each section isformed of a tubular nember i5 provided at opposite ends with outstandingflanges 16 by means of which it may be attached to the similar sectionabove and below the section described. The nienibenl is provided with acentral partition 16 designed, when the several sections are assembled,to be positioned in line with and form a continuation of the similarpartitions in the next adjacent sections thereby to form atwo-compartment air passageway through the column. One of thepassageways,l;- is opened at the bot tom through the air inlet or outlet18 and similarly the other passageway 20 is opened at the top throughthe inlet or outlet 21.

Either of these outlets may be suitably connected to an air currentproducing means fprovi'ded with a flange 25 constituting a means forfastening the rabble arms 14 thereto.

Each of the rabble arms is provided with 7 a horizontally disposedpartition 26, which has its inner end aliixed to the tubular menu berand, has'its outer end spaced a short distance from the outer end 27 ofthe rabble arm thereby to form a passageway 29 conneeting the lower side80 and the upper side 31 of the rabble arm. This lower side 80 of therabble is connected to the lower portion of the air chamber 23 whichlower side is in fluid communication with the passageway through anopening 32 in the side of the member 15. Similarly the upper side 31 ofthe rabble arm is connected through the upper side of thecompartmentr2-3 and is in fluid communication with the passageway 17through an opening 33 in the side of the tubular member 15, all as moreparticularly shown in Figure 2.

By this construction it will be obvious that air may be introducedeither at the top or a bottom of the shaft and passed successivelythrough each side of the rabble arms, cooling thesame during itspassage. 'The finally.

heated air maybe discharged onto the hearth or piped into. any of themetallurgical de- VlCGS'WhlCll can utihze heated air to advan- 'tage.

For the purpose of supplying hot air to the heaiths in the devicedisclosed, the wind boxes are provided with-port holes 34 positioned inthe side thereof, which holes are normally closed by means of coverplates 35. The rabble arms carry a plurality of rabbles 40 as is usualin devices of this character. For the purpose of supporting the rabblesdemountably in position, the lower side of the arm is flattened to formlaterally extending ledges 41 in a bottom plate 42'. A plurality ofrabble guidingmembers or clamps 413 are slidably mounted on the ledgesl1 so that the clamps can be slid longitudinallybaek and forth along thelength of the rabble arms. Each side of the clamps is pr0- vided with arabble supporting ledge 44:, with the ledge on one of the clampscoacting with the corresponding ledge on the adj cent clamp to form asupporting means for engaging under and supporting the T-head 4L5 ot'the rabbles elO asshown in Figure 6.

Each of the rabbles is provided with an air conducting passageway 46which opens through the head-45, extends within a short distancefrom'th-e lower end of rabble and is then turned 90 to exit through theport 47 at the rear side and nearthe ed-geof the blade portion d8 of therabble. The plate 42 is provided with a plurality of apertures 49 spacedapart longitudinally thereof and designed to place the hearth spaces incommunication with'the interior of each of the rabble arms when therabbles are set in their fixed position. Z Under some conditions ofroasting it found desirable to providea means for controlling the flowthrough the passageways a6 and for this purposeleach of the rabble armsis provided with a damper plate 50 slidably mounted on the top or thelate 42 The damper plate is guided betweenguiding walls 51 formed in theinterior of the rabble arms and is provided with a plurality of openings52 extending therethrough and spaced apart to correspond to and beplaced in alignment with the Openings?) at the bottom of the rabble arm.For the purpose of pro viding access tothe damper plate, the outer lowerend of therabble arm is provided with an opening 53 through which aninstrument may be inserted to engage and shift the damper plate and thusregulate the extent of opening through the apertures 49.

In operation it will be understood that the central column is revolved,carrying with it the rabble arms and that the material to be through thepassageway 29, it is obvious I that some air will be discharged throughthe rabbles onto the hearths, and theamount of this air is regulated ateach arm'si'mply by shiftingjthe damper plate contained in i the arm. I

If at anytime one of the rabbles should become burned, or otherwise,damaged, the rabbles and corresponding guide plates to the outside ofthe damaged rabble are shifted outwardly on the rabble arms andthedamaged part permitted to drop out of position onto the hearth. Theother rabbles may be shoved back into position or a new rabble maybeinserted iniplaee of the damaged rabble. V f g WVhile we liave shcwnand described and 1. In a device oi the class desc'ibed the combinationof a rabble arm provided with a guide supporting member extendinglengthwise thereof, a plurality of rabble guides slid-ably mounted onsaid member, adj acent'sides oi contiguous guides being provided withrabble supporting means, and a plurality of rabbles, each supported bysaid means between the'contiguous guides whereby any iair of adjacentguides may be separated to permit therentioval of the rabble carriedthereby without ali'ecting the mounting of the other rabbles.

2. In a device of the class described, the combination of a rabble armprovided with a guide supporting member extending lengthwise thereof, aplurality of rabble guides slidably mounted on said member, adjacentsides of contiguous guides being provided with rabble supporting. means,and a plurality of rabbles, each provided with an air passagewayforconducting air to cool the corresponding rabble and supported by saidmeans between the contiguous guides whereby any pair of adjacent guidesmay be separated to permit the removal of the rabble carried therebywithout affecting the mounting of the other rabbles,

As an article of manufacture, a rabble guide provided with means forsupporting the same on a rabble arm and also provided with means forengaging a rabble, each pair of adjacent guides forming sides of aparallelograin, the sides being at angle to the respective rabble arm.

4. In a device of the class described, a set constituting an attachmentto a rabble arm and including a pair of rabble guides provided withmeans for mounting the same side by side on a rabble arm, and each guideprovided with supporting means coactively adapted to support a rabbletherebetween,

and a rabble supported in position by said supporting means.

5. In a device of the class described, a set constituting an attachmentto a rabble arm and including a pair of rabble guides provided withmeans for mounting the same side by side on a rabble arm, and each guidearovided with supporting means coactively adapted to support a rabbletherebetween, a rabble supported in position by said supporting means,and means for cooling the rabble.

6. In a device of the class described,

set constituting an attachment to a rabble arm and including pair 01rabble guides provided with means for mounting the same side by side ona rabble arm, and each guide provided with supporting means coactivelyada 'rted to support a rabble therebetween, a rabble supported inposition by said supporting means, and air operated means for ccolii gthe rabble.

in constituting an attachment to a rabble arm and including a pair ofrabble guides pro-. idcd with means for'mounting the same side by sideon a. rabble arm, and each guide provided with supporting meanscoactively adapted to support a rabble therebetween, a rabble supportedin position by said support 1g means, and means for directing a currentof air towards the rabble for cooling it.

8. In a device of the class described, a set constituting an attachmentto a rabble arm and including a pair or rabble guides provided withmeans for mounting the same side by side on a rabble arm, and each guideprovided with supporting means coactively adapted to support a rabbletherebetween, a rabble supported in position by said supporting means,and a passage way for directing air to said rabble for cooling it.

Signed at Tacoma, in the county of Pierce and State of lvashington this28 day of November, A. D. 1921.

BENJAMIN G. CALL.

Signed at Garfield, in the county of Salt Lake, and State of Utah this23 day of November, A. D. 1921.

RICHARD A. WVAGSTAFF.

a device of the class described, a set

